Open source project for c++ developer?

Question

I am a vc++ developer (but like Qt) interested in learning from open source project by contributing and reading the code. I use windows as primary development platform. Whic

Answer 1

Participate in a Qt competition such as: Pimp My Widgets and QtCentre programming contests

Answer 2

Before reading the actual question, Chromium was my first thought. I definitely think it's worth it.